| |
| /* $Id$ |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| #ifndef __ETCHREMOTBASE_H__ |
| #define __ETCHREMOTBASE_H__ |
| |
| #include "common/EtchTypes.h" |
| #include "support/EtchDeliveryService.h" |
| #include "support/EtchStack.h" |
| #include "serialization/EtchValueFactory.h" |
| |
| class EtchRuntime; |
| |
| /** |
| * Base class for call to message translators. |
| */ |
| class EtchRemoteBase { |
| public: |
| /** |
| * Constructs the RemoteBase. |
| * |
| * @param svc the delivery service used to send messages. |
| * @param vf the value factory used to create messages and encode/decode types. |
| */ |
| EtchRemoteBase(EtchRuntime* runtime, EtchDeliveryService* svc, EtchValueFactory* vf, EtchStack* stack); |
| |
| /** |
| * Destructor |
| */ |
| virtual ~EtchRemoteBase(); |
| |
| /** |
| * Constructs a new message to send using {@link #send(Message)} or |
| * {@link #begincall(Message)}; |
| * @param type the type of the message. |
| * @param message a new message |
| * @return error if something goes wrong |
| */ |
| capu::status_t newMessage(EtchType* type, capu::SmartPointer<EtchMessage> *message); |
| |
| /** |
| * Sends the message to the recipient, but does not wait for any response. |
| * |
| * @param msg the message to send |
| * @return error if something goes wrong |
| */ |
| status_t send(capu::SmartPointer<EtchMessage> msg); |
| |
| /** |
| * Sends the message which begins a call sequence. |
| * |
| * @param msg the message to send. |
| * @return a mailbox which can be used to read the response, using |
| * {@link #endcall(Mailbox, Type)}. |
| */ |
| status_t begincall(capu::SmartPointer<EtchMessage> msg, capu::SmartPointer<EtchMailbox> &result); |
| |
| /** |
| * Finishes a call sequence by waiting for the response message. |
| * |
| * @param mb a mailbox which will be used to read the response, returned by |
| * {@link #begincall(Message)}. |
| * @param responseType the type of the expected response. |
| * @param result the value of the response field if it isn't an exception. |
| * @return an error if there is a problem sending or a timeout waiting or |
| * if the result value was an exception. |
| */ |
| status_t endcall(EtchMailbox* mb, EtchType* responseType, capu::SmartPointer<EtchObject> &result); |
| |
| /** |
| * Gets a configuration or operational value from the source. The |
| * request is passed down the chain of sources until some source |
| * recognizes the query, whereupon it returns the requested value. |
| * |
| * @param query an object representing a query, which could be as |
| * simple as a string, integer, or enum, or more complex such as |
| * a class with instance variables for query terms. |
| * |
| * @param result the requested value, or null if not defined. |
| * |
| * @return an error if there is a problem |
| */ |
| status_t transportQuery(capu::SmartPointer<EtchObject> query, capu::SmartPointer<EtchObject> *result); |
| |
| /** |
| * Sets a configuration or operational value in the source. The |
| * request is passed down the chain of sources until some source |
| * recognizes the control, whereupon it stores the specified value |
| * and returns. |
| * |
| * @param control an object representing a control, which could be as |
| * simple as a string, integer, or enum, or more complex such as |
| * a class with instance variables for control terms. |
| * |
| * @param value the value to set. |
| * |
| * @return an error if there is a problem |
| */ |
| status_t transportControl(capu::SmartPointer<EtchObject> control, capu::SmartPointer<EtchObject> value); |
| |
| /** |
| * Notifies the chain of sources of the specified event. Unlike query |
| * and control operations above, events are always passed down to the |
| * bottom to allow all sources to notice them. |
| * |
| * @param event a class which represents the event, possibly with |
| * parameters. The simplest event could be a string, integer, |
| * or enum, but any class instance will do (as long as some source |
| * in the chain expects it). |
| * |
| * @return an error if there is a problem |
| */ |
| status_t transportNotify(capu::SmartPointer<EtchObject> event); |
| |
| //////////////////////////// |
| // Convenience operations // |
| //////////////////////////// |
| |
| /** |
| * Starts the transport. |
| * @see transportControl |
| * @return an error if there is a problem |
| */ |
| status_t start(); |
| |
| /** |
| * Waits for the transport to come up. |
| * @param maxDelay max delay in milliseconds. |
| * @return an error if there is a problem |
| * @see transportQuery |
| * @return an error if there is a problem |
| */ |
| status_t waitUp(capu::int32_t maxDelay); |
| |
| /** |
| * Starts the transport and waits for it to come up. |
| * @param maxDelay max delay in milliseconds. |
| * @return an error if there is a problem |
| * @see start |
| * @return an error if there is a problem |
| */ |
| status_t startAndWaitUp(capu::int32_t maxDelay); |
| |
| /** |
| * Stops the transport. |
| * @return an error if there is a problem |
| * @see transportControl |
| * @return an error if there is a problem |
| */ |
| status_t stop(); |
| |
| /** |
| * Waits for the transport to go down. |
| * @param maxDelay max delay in milliseconds. |
| * @return an error if there is a problem |
| * @see transportQuery |
| * @see WaitDown |
| * @return an error if there is a problem |
| */ |
| status_t waitDown(capu::int32_t maxDelay); |
| |
| /** |
| * Stops the transport and waits for it to go down. |
| * @param maxDelay max delay in milliseconds. |
| * @return an error if there is a problem |
| * @see start |
| * @see waitDown |
| * @return an error if there is a problem |
| */ |
| status_t stopAndWaitDown(capu::int32_t maxDelay); |
| |
| private: |
| EtchRuntime* mRuntime; |
| EtchDeliveryService * mSvc; |
| EtchValueFactory* mVf; |
| EtchStack* mStack; |
| }; |
| |
| #endif /* __ETCHREMOTBASE_H__ */ |